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p electron physics-Superconductivity and Magnetism in Borides and Carbides-

Research Project

Project/Area Number 15204033
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics II
Research InstitutionAoyama Gakuin University

Principal Investigator

AKIMITSU Jun  Aoyama Gakuin University, College of Science and Engineering, Professor, 理工学部, 教授 (80013522)

Co-Investigator(Kenkyū-buntansha) EKINO Toshikazu  Hiroshima University, Faculty of Integrated Arts and Science, Associate Professor, 総合科学部, 助教授 (40185103)
銭谷 勇磁  青山学院大学, 理工学部, 助手 (50327285)
Project Period (FY) 2003 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥49,660,000 (Direct Cost: ¥38,200,000、Indirect Cost: ¥11,460,000)
Fiscal Year 2006: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Fiscal Year 2005: ¥10,660,000 (Direct Cost: ¥8,200,000、Indirect Cost: ¥2,460,000)
Fiscal Year 2004: ¥12,870,000 (Direct Cost: ¥9,900,000、Indirect Cost: ¥2,970,000)
Fiscal Year 2003: ¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
KeywordsSuperconductivity / pelectron system / Y_2C_3 / Tunneling spectroscopy / STM / 硼化物 / 炭化物 / 強磁性
Research Abstract

This research project had aimed to elucidate the mechanism of superconductivity and magnetism in p electron system (borides, carbides, silicides ). We developed new superconducting materials and investigated the superconductivity in MgB2, NbB2, CaAISi, Y2C3 and magnetism in CaB6 from various experimental methods. The research results are listed as follows;
1. We clarified that MgB2 is a new type strong coupling superconductor of which high energy phonon of light element plays an important role, because unusual temperature dependence of phonon density of states was observed at the energy range, corresponding to in B-plane phonon in MgB2 and Al-doped MgB2 probed by inelastic neutron scattering. From tunneling spectroscopy, we observed multi superconducting gaps which are correlated with each other.
2. From the energy gap measurement by tunneling spectroscopy and MEM/Rietveld analysis using synchrotron X-ray in NbB2 and CaA1Si of which crystal structures are same with MgB2, we elucidate tha … More t these superconductors are considered to be strong coupling superconductors and have some correlation between superconducting properties and crystal structures in each system.
3. We discovered new superconductors W_7Re_<13>X(X=B, C) (T_c=7.1 K, 7.3 K), Mo_7Re_<13>X(X=B, C) (T_c=8.3 K, 8.1 K) and Y_2C_3(T_c=18 K). The T_c of Y_2C_3 is changed from 11 K to 18 K by nominal composition and heat treatment. To elucidate the change of T_c in Y_2C_3 in terms of crystal structure, we performed crystal structure analysis and MEM/Rietveld analysis using synchrotron X-ray in detail. We clearly observed the forming C-C dimmer in Y_2C_3 and the evidence for correlation between Tc and the distance of C-C dimmer. From specific heat, ^<13>C-NMR and tunneling spectroscopy measurements, Y_2C_3 has two gaps in its superconducting state and each gap reveals the s-wave symmetry behavior. Especially, it is considered that the correlation between each gap is relatively small from the temperature dependence of each superconducting gap.
4. We observed some phase transition of weak internal field at 150 K in temperature dependence of asymmetry of CaB_6 in μSR measurement. This behavior can not be ascribed to nuclear dipole field of B atoms. Moreover, a small electron pocket at Γ point was observed by ARPES (Angle Resolved Photo Emission Spectroscopy) using high quality single crystal of CaB_6. It is suggested that an unusual-magnetic behavior in CaB_6 is related to these results observed in μSR and ARPES measurements. Less

Report

(5 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (97 results)

All 2007 2006 2005 2004 2003 Other

All Journal Article (88 results) Book (3 results) Publications (6 results)

  • [Journal Article] Scanning tunneling microscopy and spectroscopy of MgB_22007

    • Author(s)
      T.Ekino
    • Journal Title

      Journal of Physics; Conference Series (印刷中)

      Pages: 5-5

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Evidence of the Fine Pseudo-gap at the Fermi Level in Al-based Quasicrystals2007

    • Author(s)
      J.T.Okada
    • Journal Title

      Journal of the Physical Society of Janan 76

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Scanning tunneling microscopy and spectroscopy of MgB_22007

    • Author(s)
      T.Ekino
    • Journal Title

      J.Phys. : Conf.Ser. 61

      Pages: 278-282

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Evidence of the Fine Pseudo-gap at the Fermi Level in Al-based Quasicrystals2007

    • Author(s)
      J.T.Okada
    • Journal Title

      J.Phys.Soc.Jpn. 76

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Scanning tunneling microscopy and spectroscopy of MgB_22007

    • Author(s)
      T.Ekino
    • Journal Title

      Journal of Physics : Conference Series (印刷中)

      Pages: 5-5

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Evidence of the Fine Pseudo-gap at the Fermi Level in Al-based Quasicrystals2007

    • Author(s)
      J.T.Okada
    • Journal Title

      Journal of the Physical Society of Japan 76

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Spin dependent tunneling current in junctions involving CDW metals2006

    • Author(s)
      T.Ekino
    • Journal Title

      Japanese Journal of Applied Physics 45

      Pages: 2242-2245

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Spin dependent splitting of the tunnel conductivity peaks in the magnetic field for junctions involving CDW metals2006

    • Author(s)
      T.Ekino
    • Journal Title

      Physica B 378-380

      Pages: 567-568

    • NAID

      120000875871

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Tunneling measurements of CeRhAs single crystal2006

    • Author(s)
      T.Ekino
    • Journal Title

      Physica B 378-380

      Pages: 768-787

    • NAID

      120000875872

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Electron tunneling experiments on La-substituted Kondo semiconductor CeRhAs2006

    • Author(s)
      T.Ekino
    • Journal Title

      Physica B 383

      Pages: 26-27

    • NAID

      120000875873

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Tunneling spectroscopy of CaAlSi2006

    • Author(s)
      T.Takasaki
    • Journal Title

      Physica B 383

      Pages: 80-81

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Tunneling spectroscopy of the electron-doped superconductors MNCl_<0.7> (M=Hf, Zr)2006

    • Author(s)
      T.Takasaki
    • Journal Title

      Physica C 445-448

      Pages: 77-79

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Tunneling spectroscopy of single-crystal clathrate Ba_8Ga_<16>Sn_<30>2006

    • Author(s)
      R.A.Ribeiro
    • Journal Title

      Physica B 383

      Pages: 126-127

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Superconductivity in Y_2C_3 with medium T_c2006

    • Author(s)
      S.Akutagawa
    • Journal Title

      Science and Technology of Advanced Materials 7

      Pages: 2-5

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Superconductivity in intermetallic compound Mo_7Re_<13>X(X=B,C)2006

    • Author(s)
      K.Kawashima
    • Journal Title

      Science and Technology of Advanced Materials 7

      Pages: 9-11

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Possible weak magnetism in MB_6 (M : Ca, Ba) probed by muon spin relaxation and muon level-crossing resonance2006

    • Author(s)
      S.Kuroiwa
    • Journal Title

      Science and Technology of Advanced Materials 7

      Pages: 12-16

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Relationship between superconductivity and crystal structure in NbB_<2+x>2006

    • Author(s)
      H.Takagiwa
    • Journal Title

      Science and Technology of Advanced Materials 7

      Pages: 22-25

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Spin-dependent tunneling in a magnetic field for junctions involving normal and superconducting CDW metals2006

    • Author(s)
      T.Ekino
    • Journal Title

      Acta Physica Polonica A 109

      Pages: 477-484

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Current carrier localization and coulomb gap observed in SrPbO_<3-δ> by transport measurements and tunnel spectroscopy2006

    • Author(s)
      V.A.Drozd
    • Journal Title

      Journal of Physics ; Condens.Matter 17

      Pages: 7407-7416

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Tunneling spectroscopy of deintercalated layered nitride superconductors ZrNCl_<0.7>2006

    • Author(s)
      T.Takasaki
    • Journal Title

      J.Phys.Soc.Jpn. 74

      Pages: 2586-2591

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Break-junction tunneling spectra of MgB_2 : influence of boron quality2006

    • Author(s)
      R.A.Ribeiro
    • Journal Title

      Physica C 426-431

      Pages: 450-453

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Electron tunneling experiments on La-substitute Kondo semiconductor CeRhAs2006

    • Author(s)
      T.Ekino
    • Journal Title

      Physica B 383

      Pages: 26-27

    • NAID

      120000875873

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Tunneling spectroscopy of the electron-doped superconductors MNCl_<0.7> (M= Hf, Zr)2006

    • Author(s)
      T.Takasaki
    • Journal Title

      Physica C 445-448

      Pages: 77-79

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Tunneling spectroscopy of single-crystal clathrate Ba_8Ga_<10>Sn_<30>2006

    • Author(s)
      R.A.Ribeiro
    • Journal Title

      Physica B 383

      Pages: 126-127

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Superconductivity in Y_2C_3 with medium T_c2006

    • Author(s)
      S.Akutagwa
    • Journal Title

      Science and Technology of Advanced Materials 7

      Pages: 2-5

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Superconductivity in intermetallic compound Mo_7Re_<13>X(X=B, C)2006

    • Author(s)
      K.Kawashima
    • Journal Title

      Science and Technology of Advanced Materials 7

      Pages: 9-11

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Tunneling spectroscopy of AlB_2 type silicide CaAlSi2006

    • Author(s)
      T.Takasaki
    • Journal Title

      Physica B 383

      Pages: 80-81

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Tunneling spectroscopy of CaAlSi2006

    • Author(s)
      T.Takasaki
    • Journal Title

      Physica B (印刷中)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Tunneling spectroscopy of single-crystal clathrate Ba_8Ga_<16>Sn_<30>2006

    • Author(s)
      R.A.Ribeiro
    • Journal Title

      Physica B (印刷中)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Relationship between supercondudtivity and crystal structure in NbB_<2+x>2006

    • Author(s)
      H.Takagiwa
    • Journal Title

      Science and Technology of Advanced Materials 7

      Pages: 22-25

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Spin dependent tunneling current injunctions involving CDW metals2006

    • Author(s)
      T.Ekino
    • Journal Title

      Japanese Journal of Applied Physics 45

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Tunneling measurements of CeRhAs single crystal2006

    • Author(s)
      T.Ekino
    • Journal Title

      Physica B (印刷中)

    • NAID

      120000875872

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Spin dependent splitting of the tunnel conductivity peaks in the magnetic field for junctions involving CDW metals2006

    • Author(s)
      T.Ekino
    • Journal Title

      Physica B (印刷中)

    • NAID

      120000875871

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Electron tunneling experiments on La-substituted Kondo semiconductor CeRhAs2006

    • Author(s)
      T.Ekino
    • Journal Title

      Physica B (印刷中)

    • NAID

      120000875873

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Tunneling spectroscopy of the electron-doped superconductors MNCl_<0.7>(M=Hf,Zr)2006

    • Author(s)
      T.Takasaki
    • Journal Title

      Physica C (印刷中)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Superconductivity in Intermetallic W_7Re_<13>X (X=B and C) Compounds2005

    • Author(s)
      K.Kawashima
    • Journal Title

      J. Phys. Soc. Jpn. 74

      Pages: 700-704

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Superconducting phase diagram in Ca_<2-x>Na_xCuO_2Cl_<2-y>Br_y2005

    • Author(s)
      Y.Zenitani
    • Journal Title

      Physica C 419

      Pages: 32-40

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Manifestations of inhomogeneity neity in MgB_2 : From specific heat to tunnel measurements2005

    • Author(s)
      T.Ekino
    • Journal Title

      Physica B 359-361

      Pages: 460-462

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Pauli effect of the magnetic field on superconductors with charge-density waves2005

    • Author(s)
      T.Ekino
    • Journal Title

      Low Temp. Phys. 31

      Pages: 41-46

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Spin-polarized electron tunneling between charge-density-wave metals2005

    • Author(s)
      T.Ekino
    • Journal Title

      Low Temp. Phys. 31

      Pages: 59-72

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Spatially heterogeneous character of superconductivity in MgB_2 as revealed by local probe and bulk measurements2005

    • Author(s)
      T.Ekino
    • Journal Title

      Physica C 426-431

      Pages: 230-233

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Enhancement of the paramagnetic limit for superconductors with charge-density waves2005

    • Author(s)
      T.Ekino
    • Journal Title

      Physica C 426-431

      Pages: 325-329

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Current carrier localization and coulomb gap observed in SrPbO_<3-δ> by transport measurements and tunnel spectroscopy2005

    • Author(s)
      V.A.Drozd
    • Journal Title

      Journal of Physics; Condens. Matter 17

      Pages: 7407-7416

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Tunneling spectroscopy of deintercalated layered nitride superconductors ZrNCl_<0.7>2005

    • Author(s)
      T.Takasaki
    • Journal Title

      J. Phys. Soc. Japan 74

      Pages: 2586-2591

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Point-contact spectroscopy measurements of binary superconductor MgB_22005

    • Author(s)
      T.Takasaki
    • Journal Title

      Physica C 426-431

      Pages: 300-303

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Break-junction tunneling spectra of MgB_2 : influence of boron quality2005

    • Author(s)
      R.A.Ribeiro
    • Journal Title

      Physica C. 426-431

      Pages: 450-453

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Electrical resistivity and tunneling anomalies in CeCuAs_22005

    • Author(s)
      E.V.Sampathkumaran
    • Journal Title

      Physica B 359-361

      Pages: 108-110

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Possible application of carbon nanotubes to the field emission electron source for portable betatrons2005

    • Author(s)
      T.Ohnishi
    • Journal Title

      Nuclear Instruments and Methods in Physics Research A 539

      Pages: 16-24

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Roman scattering study of rare-earth hexaboride2005

    • Author(s)
      N.Ogita
    • Journal Title

      Physica B 359-361

      Pages: 941-943

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Break-junction tunneling spectra of MgB_22005

    • Author(s)
      R.A.Ribeiro
    • Journal Title

      Physica C 426-431

      Pages: 450-453

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] MgB_2の超伝導特性とその応用の可能性2005

    • Author(s)
      村中 隆弘
    • Journal Title

      まてりあ 第44巻・第9号

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Superconductivity in MgB_2 and Its Related Materials2005

    • Author(s)
      J.Akimitsu
    • Journal Title

      Prog. Phys., Supplement No. 159

      Pages: 326-337

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Superconductivity in Intermetallic W_7Re_<13>X (X=B and C) Compounds2005

    • Author(s)
      K.Kawashima
    • Journal Title

      J.Phys.Soc.Jpn. 74

      Pages: 700-704

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Superconducting phase diagram in Ca_2-xNa_xCuO_2Cl_<2-y>Br_y2005

    • Author(s)
      Y.Zenitani
    • Journal Title

      Physica C 419

      Pages: 32-40

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Manifestations of inhomogeneity in MgB_2 : From specific heat to tunnel measurements2005

    • Author(s)
      T.Ekino
    • Journal Title

      Physica B 359-361

      Pages: 460-462

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Pauli effect of the magnetic field on superconductors with charge-density waves2005

    • Author(s)
      T.Ekino
    • Journal Title

      Low Temp.Phys. 31

      Pages: 41-46

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Spin-polarized electron tunneling between charge-density-wave metals2005

    • Author(s)
      T.Ekino
    • Journal Title

      Low Temp.Phys. 31

      Pages: 59-72

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Possible application of carbon nanotubes to th field emission election source for portable betatrons2005

    • Author(s)
      T.Ohnishi
    • Journal Title

      Nuclear Instruments and Methods in Physics Research A 539

      Pages: 16-24

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Superconducting properties and its applicatio of MgB_22005

    • Author(s)
      T.Muranaka
    • Journal Title

      MATERIA 44

      Pages: 722-728

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Superconductivity in MgB_2 and Its Relate Materials2005

    • Author(s)
      J.Akimitsu
    • Journal Title

      Prog.Phys., Supplement No. 159

      Pages: 326-337

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Tunneling spectroscopy of deintercalated layered nitride superconductors ZrNCl_<0.7>2005

    • Author(s)
      T.Takasaki
    • Journal Title

      J.Phys.Soc.Japan 74

      Pages: 2586-2591

    • Related Report
      2005 Annual Research Report
  • [Journal Article] MgB_2の超伝導特性とその応用の可能性2005

    • Author(s)
      村中 隆弘
    • Journal Title

      まてりあ 第44巻第9号

      Pages: 722-728

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Superconductivity in MgB_2 and Its Related Materials Prog2005

    • Author(s)
      J.Akimitsu
    • Journal Title

      Phys., Supplement No.159

      Pages: 326-337

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Break junction tunneling spectra of MgB_2 : influence of boron quality2005

    • Author(s)
      R.A.Ribeiro
    • Journal Title

      Physica C. 426-431

      Pages: 450-453

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Point-contact spectroscopy measurements of binary superconductor MgB_22005

    • Author(s)
      T.Takasaki et al.
    • Journal Title

      Physica C (印刷中)

      Pages: 4-4

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Superconductivity in Intermetallic W_7Re_<13>X (X=B and C) Compounds2005

    • Author(s)
      K.Kawashima et al.
    • Journal Title

      J.Phys.Soc.Jpn. 74

      Pages: 700-704

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Superconducting phase diagram in Ca_<2-x>Na_xCuO_2Cl_<2-y>Br_y2005

    • Author(s)
      Y.Zenitani et al.
    • Journal Title

      Physica C 419

      Pages: 32-40

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Superconductivity at 18 K in Yttrium Sesquicarbide System, Y_2C_32004

    • Author(s)
      G.Amano
    • Journal Title

      J. Phys. Soc. Jpn. 73

      Pages: 530-532

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Multiple-gap features from break junction tunneling in the superco nducting MgB_22004

    • Author(s)
      T.Takasaki
    • Journal Title

      J. Phys. Soc. Jpn. 73

      Pages: 1902-1913

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Tunneling measurements of superconducting NbB_22004

    • Author(s)
      T.Ekino
    • Journal Title

      Physica C 408-411

      Pages: 828-829

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Energy gap structure in the binary superconductor MB_2 (M=Nb and Mg)2004

    • Author(s)
      T.Takasaki
    • Journal Title

      Physica C 412-414

      Pages: 266-269

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Unconventional Behavior of Field-induced Quasiparticle Excitation in Ca(Al_<0.5>Si_<0.5>)_22004

    • Author(s)
      S.Kuroiwa
    • Journal Title

      J. Phys. Soc. Jpn. 73

      Pages: 2631-2634

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Superconductivity at 18K in Yttrium Sesquicarbide System, Y_2C_32004

    • Author(s)
      G.Amano
    • Journal Title

      J.Phys.Soc.Jpn. 73

      Pages: 530-532

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Multiple-gap features from break junction tunneling in the superconducting MgB_22004

    • Author(s)
      T.Takasaki
    • Journal Title

      J.Phys.Soc.Jpn. 73

      Pages: 1902-1913

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Energy gap structure in the binarysuperconductor MB_2 (M=Nb and Mg)2004

    • Author(s)
      T.Takasaki
    • Journal Title

      Physica C 412-414

      Pages: 266-269

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Unconventional Behavior of Field-induced Quasiparticle Excitation in Ca(Al_<0.5>Si_<0.5>)_22004

    • Author(s)
      S.Kuroiwa
    • Journal Title

      J.Phys.Soc.Jpn. 73

      Pages: 2631-2634

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Multiple-gap features from break junction tunneling in the superconducting MgB_22004

    • Author(s)
      T.Takasaki et al.
    • Journal Title

      J.Phys.Soc.Jpn. 73

      Pages: 1902-1913

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Tunneling measurements of superconducting NbB_22004

    • Author(s)
      T.Ekino et al.
    • Journal Title

      Physica C 408-411

      Pages: 828-829

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Unconvetional Behavoir of Field-induced Quasiparticle Excitation in Ca(Al_<0.5>Si_<0.5>)_22004

    • Author(s)
      S.Kuroiwa et al.
    • Journal Title

      J.Phys.Soc.Jpn. 73

      Pages: 2631-2634

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Electronic Band Structure and Fermi Surface of CaB_6 Studied by Angle-Resolved Photoemission Spectroscopy2003

    • Author(s)
      S.Souma
    • Journal Title

      Phys. Rev. Lett. 90

      Pages: 27202-27202

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Quasiparticle Excitations outside the Vortex Cores in MgB_2 Probed by Muon Spin Rotation2003

    • Author(s)
      K.Ohishi
    • Journal Title

      J. Phys. Soc. Jpn. 72

      Pages: 29-29

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Tunneling spectroscopy of the superconducting gap in MgB_22003

    • Author(s)
      T.Ekino
    • Journal Title

      Phys. Rev. B 67

      Pages: 94504-94504

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Multiple-gap structure of the binary superconductor MgB_22003

    • Author(s)
      T.Takasaki
    • Journal Title

      Physica C 388-389

      Pages: 147-148

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] The superconductivity in Re-B system2003

    • Author(s)
      A.Kawano
    • Journal Title

      J. Phys. Soc. Jpn. 72

      Pages: 1724-1728

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Electronic Band Structure and Fermi Surface of CaB_6 Studied by Angle-Resolved Photoemission Spectroscopy2003

    • Author(s)
      S.Souma
    • Journal Title

      Phys.Rev.Lett. 90

      Pages: 27202-27202

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Quasiparticle Excitations outside the Vortex Cores in MgB_2 Probed by Muon Spin Rotation2003

    • Author(s)
      K.Ohishi
    • Journal Title

      J.Phys.Soc.Jpn. 72

      Pages: 29-29

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Tunneling spectroscopy of the superconducting gap in MgB_22003

    • Author(s)
      T.Ekino
    • Journal Title

      Phys.Rev.B 67

      Pages: 94504-94504

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] The superconductivity in Re-B system2003

    • Author(s)
      A.Kawano
    • Journal Title

      J.Phys.Soc.Jpn. 72

      Pages: 1724-1728

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Book] Competition between superconductivity and charge carrier localization in plumbates; in Progress in Superconductivity Research(分担執筆)2007

    • Author(s)
      A.M.Gabovich
    • Total Pages
      38
    • Publisher
      Nova Science Publishers, Inc.(印刷中)
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Book] Competition between superconductivity and charge carrier localization in plumbates; in Progress in Superconductivity Research2007

    • Author(s)
      A.M.Gabovich
    • Total Pages
      38
    • Publisher
      Nova Science Publishers, Inc.
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Book] Competition between superconductivity and charge carrier localization in plumbates; in Progress in Superconductivity Research (分担執筆)2007

    • Author(s)
      A.M.Gabovich
    • Total Pages
      38
    • Publisher
      Nova Science Publishers, Inc.
    • Related Report
      2006 Annual Research Report
  • [Publications] S.Souma: "Electronic Band Structure and Fermi Surface of CaB_6 Studied by Angle-Resolved Photoemission Spectroscopy"Phys.Rev.Lett.. 90. 027202 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Ohishi: "Quasiparticle Excitations outside the Vortex Cores in MgB$_2$ Probed by Muon Spin Rotation"J.Phys.Soc.Jpn.. 72. 29 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Ekino: "Tunneling spectroscopy of the superconducting gap in MgB_2"Phys.Rev.B. 67. 094504 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Takasaki: "Multiple-gap structure of the binary superconductor MgB_2"Physica C. 388-389. 147-148 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] A.Kawano: "The superconductivity in Re-B system"J.Phys.Soc.Jpn.. 72. 1724-1728 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] G.Amano: "Superconductivity at 18 K in Yttrium Sesauicarbide System, Y_2C_3"J.Phys.Soc.Jpn.. 73. 530-532 (2004)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2020-05-15  

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